Improvement in umbrellas



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TO ALL PERSONSITO WHOM THESE PRESENTS SHALL COME:

' Be it-known that I, HORACE T. ROBBINS, of Boston, in the county ofSuffolk, and State of Massachusetts, have invented a new and usefulImprovement in Umbrella-Frames;'and I do hereby declare that the same isfully described in the following specification and accompanyingdrawings, letters, figures, and references thereof'. Of the saiddrawings-1 y 4 Figure 1 represents a side view of, an umbrella-framehaving my improvement applied to-it.

-Figure 2 is an inside view of the same, with thehandle cut off on theline A B'.

Y Similar letters refer to like parts in the different drawing-s. C isthe handle; D, the ribs; E, the rib jointplate; F, the stretchers; G,thestretcher joint-slide. l

The nature of my inventionV consists in constructing umbrella-frames insuch a manner` as to give them suflcient strength to withstand. thepressureof the wind either from the outside or inside. Many times, whenan umbrella is the most needed, it is impossible to carry it open,on-account of the liability of the wind to get under and turn it; or ifcarried against a strong'wind, the ribs are so much bent in by thepressure as to make it. of little service.

-To prevent these difiicul'ties, I use braces A,`figs. 1, 2, to supportthe ribs D. One end of each of these braces'is attached to thejoint-plate b by a wire, which forms the joint c.

Figurev 3 is a top View of the joint-plate b, detached from the handleC. d is a hole to admit the handle.

'c are notches to receive the ends ofthe braces a, which make the jointc.

Figure 4'is a. sectionof iig. 3'on the line II I. This joint-plate islike the joint-plate E, except .it is so much smaller as to let the ribsD shut down over without coming in contact with it when the frame isclosed. The joint-plate 6 is fastened to the handle C by passing aIrivet through the plate and handle. The opposite end of each of thebraces a is connected to the ribs D by joints e, and they are arrangedso as to bring the ribs straight with the handle when closed; also, soas to give the proper form to the ribs outside of the stretcher-sA whenopen. This arrangement relieves the cloth of the greater part of thestrain which is caused by the pressure of the ribs against itin'ordinary umbrellas when open, consequently the cloth will last longerthan when cut small enongh'on the edge toA give form to the ribs outsideof the stretchers. Again, in ordinary umbrellas, the ribs become bent byusage, rendering the cloth too loose, which at first was too tight. Butthe use of these braces it is always kept of' a proper tension, and thewind can neither turn 4nor bend in the ribs whichever way they maybe-car'ried. The ribs may also be made lighter than those in ordinaryumbrellas, so that those made with the braces are not any heavier thanthose without them, `but are much stronger and more durable. Thesebraces may be applied with great advantage to old umbrellas, whose ribshave lost their elasticity, as well as to new ones.

In constructing my improved umbrella-frames, I arrange all the parts inthe usual way, except the stretcliers F. These I split open at the outerend or joint`f, as far up as the shoulder g, forming the slot h. fig. 6,to allow.

the braces a to.'passthrough. V

Figure 5 is a side view of one of the stretchers detached from theframe. is a hole, through which a rivet put to make the jointf. j is ahole, through which passes the wire c to connect it to thestretcher-slide G,

fies. 1, 2.

a Figure 6 `is a bottom view of fig. 5, showing the slot z, throughwhich swing the braces` a, figs. 1, 2, as the frame is opened andclosed. v

Figure 7 is a. side view of one ofthe braces a detached from the frame'.lis a hole, through which a rivet is put to form thejoint e, figs. 1, 2.m is a hole through the opposite end, through which n wire passes toconneet it'to the joint-plate b to make the joint c, figs. .1,v 3, 4.

Figure 8 is a bottom `view of` iig. 7. n is a slot, to connect it to therib D, and forms the joint e, figs. 1, 2. The bottom side of thesebraces restson the shoulder g in the slot 7L, figs. 1, 2, 6, when theframes are open. These shoulders act as counter-braces, and renderthebraccs a much more firm to resist a pressure on the outside oftheribs D than they would be if there were nothing to support them betweenthe two ends. The circular form which I give tc the braces a insures theinclination ofthe braces against the shoulder g in case of a pressure onthe outside of lthe'ribs D.

1. I claim providing umbrellas with auxiliary braces, as and for thepurpose specified. 2. The combina-tion of the runner b, braces a,vandfribs-D, substantially as described. 3. The arrangement of thestretchers F, having slots h, with the braces a, substantially asdescribed.

i HORACE T.' ROBBINS.

- Witnesses:

A. F. BADGER, WILLIAM EASON.

